获得class类的几种方式-526互联

package edu.wtbu;
public class Demo01{
    public static void main(String[] args) throws ClassNotFoundException {
        Person student = new Student();
        System.out.println("这个人是："+student.name);

        //方式一：通过对象获得
        Class<? extends Person> c1 = student.getClass();
        System.out.println(c1.hashCode());

        //方式二：通过forName获得
        Class<?> c2 = Class.forName("edu.wtbu.Student");
        System.out.println(c2.hashCode());

        //方式三：通过类名.class获得
        Class<Student> c3 = Student.class;
        System.out.println(c3.hashCode());

        //基本内置类型的包装类都有一个TYPE属性
        Class<Integer> c4 = Integer.TYPE;
        System.out.println(c4);//int

        //获得父类类型
        Class<?> c5 = c1.getSuperclass();
        System.out.println(c5);//class edu.wtbu.Person
    }
}

class Person{
    String name;

    public Person() {
    }

    public Person(String name) {
        this.name = name;
    }

    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + '\'' +
                '}';
    }
}

class Student extends Person{
    public Student() {
        this.name="学生";
    }
}

class Teacher extends Person{
    public Teacher() {
        this.name="学生";
    }
}